Why didn't the elevators work in the Trade Center that day? I'll tell you. Official investigations have not answered that question.
Many thanks to NK44 and MirageMemories for the work at http://s1.zetaboards.com/LooseChangeForums/topic/1701709/1/
NIST clips, Port Authority radio transcripts, dozens of witnesses help describe the plan to disable the firefighting effort, to keep the cover story alive: FIRE induced collapse.
Then the official investigations totally ignored the evidence for bombs. Totally ignored the elevator investigation. Here's audio, video, photographic proof... when viewed with the architectural drawings and a good understanding of the elevator system.